# Advent of Code 2025 in Forth

The abbreviated season. 

In [UF Forth](http://www.call-with-current-continuation.org/uf/uf.html) for the [Uxn/Varvara](https://100r.co/site/uxn.html) system.

Watch me explain things [on YouTube](https://www.youtube.com/watch?v=FxwPXlcseQA&list=PL1ogWmqjJQUFg04wsGlS64y9V6c8Gql5N)

To run, first install the uxn toolset, then build uf as described in its README. We'll use `uf.rom`

```
cat 01.f input | uxncli uf.rom 
```

Notes on days:
02 -- Skipping due to heavy use of 32+64 bit numbers

This will print each solution on a line

Previous years:

* [2024](https://git.sr.ht/~aw/advent-of-code-2024) -- Ruby (4 stars)
* [2023](https://git.sr.ht/~aw/dusk-aoc) -- Dusk OS Forth (13 stars)
* [2022](https://git.sr.ht/~aw/advent-of-code-2022) -- UF Forth (14 stars)
* [2021](https://git.sr.ht/~aw/advent-of-code/tree/main/item/2021) -- Rust (20 stars)
* [2020](https://git.sr.ht/~aw/advent-of-code/tree/main/item/2020) -- C (25 stars)
* [2019](https://git.sr.ht/~aw/advent-of-code/tree/main/item/2019) -- Rust (22 stars)